Description

GT00459 from A drud

$if [NOT] s1 == s2 ......
$if NOT == should be an error
$if %string% == somthing   is a problem of %string% is NOT

new rules:

1.  to regonize a NOT we need a space following NOT
2.  NOT == is an error

Small Model of Type : GAMS

Category : GAMS Test library

Main file : ifnot1.gms

$title Better recognition of $if NOT == (IFNOT1,SEQ=20)

* GT00459 from A drud
*
* $if [NOT] s1 == s2 ......
* $if NOT == should be an error
* $if %string% == somthing   is a problem of %string% is NOT
*
* new rules:
*
* 1.  to regonize a NOT we need a space following NOT
* 2.  NOT == is an error

scalar badresult  / 0 /
       goodresult / 0 /;

$if NOT == abc      display 'this should be an error';
$if     errorfree $abort above is wrong
$clearError

$if NOT == NOT      display 'one not';
$if     errorfree $abort above is wrong
$clearError

$if NOT == ''       display 'one not';
$if     errorfree $abort above is wrong
$clearError

$if NOT '' == abc   goodresult = goodresult + 1; display goodresult;
$if NOT== abc       badresult  = badresult  + 1; display badresult;
$if NOT== NOT       goodresult = goodresult + 1; display goodresult;
$if NOT= ==  "NOT=" goodresult = goodresult + 1; display goodresult;
$if NOT''== abc     badresult  = badresult  + 1; display badresult;
$if NOT''== "NOT''" goodresult = goodresult + 1; display goodresult;
$if NOT = == ''     goodresult = goodresult + 1; display goodresult;
$if NOT = == =      badresult  = badresult  + 1; display badresult;
$if     = == =      goodresult = goodresult + 1; display goodresult;

abort$badresult ' something wrong';